Follower-rest for lathes.



\ No. 809,513. v PATENTED JAN. 9, 1906.

' W. LODGE & N. D. GHARD.

FOLLOWBR REST FOR LATHES. APPLIOATION FILED mums, 1905.

mf A wir N0. 809,513. PATENTBD JAN. 9, 1906.

W. LODGE 6L N. D. CHARD. FOLLOWER REST FOR LATHBS.

APPLICATION FILED JUNE 26, 1905.

2 SHEETS-SHEET 2.

w WM ffy/mm umm-a l M @iffm UNITED sTATEs PATENT oEEIoE.

WILLIAM LODGE AND NICHOLAS D. CHARD, OF CINCINNATI, OHIO,

ASSIGNORS TO THE LODGE & SHIPLEY MACHINE TOOL COM- PANY, .OF CINCINNATI, OHIO, A CORPORATION.

Specification of Letters Patent.

Patented .Tanv 9, 1306.

Application flledvJune 26, 1905. Serial No. 267,083.

To all whom t may concern,.-

` Be it known that we, W'ILLIAM LODGE and NICHOLAS D. CHARD, citizens of the United States,'residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Follower-Rests for Lathes, of which the following is a specification.

Our invention relates to a followerrest which is an attachment for the carriage of an enginelathe, adapted to engage the work under process of reduction in rear of the tool to withstand the lateral strain upon the work between its supported ends.

The objects, various advantages, and the features of the invention will be more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which-- Figure 1 is a top plan view of the attachment. Fig. 2 is a section on line :c Fig. 1. Fig. 3 is a section on line y y, Fig. 2. Fig. 4 is a section on line w fw, Fig. 2. Fig. 5 is a detail view of one of the segmental bearings. Fig. 6 is a section on line 'u o, Fig. 5. Fig. 7 is a view showing the attachment in elevation and the carriage-feed mechanism in section. Fig. 8 is a top plan View showing a piece of shoulder-Work supported between the spindles with relative positions to the tool and attachment.

Only so much of the machine construction is shown as will serve to illustrate the application of the attachment.

l represents the carriage of the machinetool, in this instance an engine-lathe, which is assumed to be traversable upon the ways of the bed between the spindles. This carriage is provided with the transverse gibway 2. (See Fig. 1.) Gibbed to the said Way is the tool-holder 3 on the front of the carriage and the follower-rest 4 on the rear of the carriage.

Mechanism is provided for feeding the toolholder on its way to and from the front side of the work supported between the spindles and for feeding the follower-rest to 'and from the rear side of the work, the details of which mechanism are shown in details, Fig. 7, in which 5 represents a sleeve screw-shaft having screw threaded engagement with the sleeve 6, depended from the tool-holder 3. 7 represents a screw shaft having a screwthreaded engagement with the sleeve 8, depended from the follower rest 4. The top portion of the way 2 is of course slotted under the tool-holder and under the follower-rest, respectively, toA permit of the downward proj ection of the sleeves 6 and 8. Screw-shaft 7 is projected through the sleeve screw-shaft 5 and has its front end projected through the front of the carriage. The screw-shaft 7 has the clutch member 9 on the front end thereof,'and the sleeve screw-shaft 5 has the clutch member 10, these clutch-faces opposing one another. 11 represents the operating-handle between clutches 9 and 10, having the opposite clutch members 12 and 13 formed on the'said handle to engage, respectively, with the clutch members 9 and 10 alternatively as the handle is slid to effect the desired engagement. Then clutches 10 and 13 are engaged, the tool-holder may be reciprocated on its gibway 2, and when clutches 9 and 12 are engaged the follower-rest 4 may be reciprocated on said gibway. It is desired for some applications of this follower-rest to have the tool-holder adjustable laterally or in a line parallel with the work. This may be effected in any ordinary manner, such as an adjusting-screw connection, or it may be accomplished by providing the tool-holder with the lateral slot 14 and the connectingbolt 15 for attaching it to the gibway, which permits of the lateral adjustment of the toolholder. It should be remarked, however, that to accomplish this function it would be equally practical to give the follower-rest a lateral adjustment, the relative lateral adjustment of the follower-rest bearings and the tool being the obj ect sought, as indicated by the dotted lines 16, representing the follower-rest bearings, and 17 representing the tool in the diagram of Fig. 8.

We will now describe the details of the follower-rest. It consists of a stock 18, in the side of which, facing the work, has been formed the quasicircumferential way 19. (See Fig. 2.) In this way 19 are the coincidentally-curved segments 2O 21, having in the ends of them respectively journaled the bearings 22 23, as shown in details, Figs. 2 and 6. The segment 20 is provided with a segmental slot 24, and the segment 21 has the segmental slot 25. Through these slots pass the clamping-bolts 26 27, as shown in lOO Fig. 4, which engage into the stock 18. The outer face of the segment 2O has the Wormthreads 28. 29 represents an adjustingshaft j ournaled in the upper portion of the stock, having a worm 30 engaging the wormthread 28. The segment 21 has similar set of threads 31. 32 represents a similar adjusting-shaft journaled in the rear of the stock 18 and having a worm33 engaging with the thread 31. By means of these clampingbolts and these adjusting-shafts it is quite obvious that the segments 2() 21 may be adjustably secured in the stockway 19, so as to constitute engaging jaws of the bearings 22 23, the gap of the jaws being adjustable. These aws are presented-on the rear side of the work, as illustrated in Fig. 7, and, as indicated in the dotted lines 34 35, representing pieces of work of different diameter, it is obvious that the jaws set at a given gap may have quite a range of bearing engagement with different diameters of work without a resetting of the segments. This is of particular advantage in turning work of the shoulder character represented by the cylindrical piece, (shown in Fig. 8,) which piece has the different diameter shoulders 36 37 38, in which case under ordinary conditions the segments 20 21 do not have to be set for these different diameters incident to the given piece of work.

In Fig. 8 39 40 represent the live and dead spindles, respectively. 41 represents the tool in full lines. 42 represents in full lines one of the bearing-rollers of the follower-rest. The roller-bearings permit the work to be rotated Without substantial friction.

In ordinary cylindrical work the tool and the follower-rest will be traversed by their feed devices to engage the opposite sides of the work, as indicated by the parts 41 42, Fig. 8. In turning the shoulder-work it is desirable when going from the smaller to a larger diameter-say from the shoulder 38 to the shoulder 37-that the tool be set in advance of the follower-rest-engaging jaws, as indicated by the dotted lines 16 and 17, Fig. 8, in which the tool 17 is taking its first bite on the shoulder 37 while the jaws of the follower-rest are still engaging the periphery of the small diameter 38. Just as soon as av slight reduction has been effected on the shoulder 37 the carriage can be moved back, the tool and the aws set in direct opposition, and through their feed mechanisms the tool and the jaws may be brought into engagement with the new diameter of the work. With this attachment and in this class of work it is desirable to use some diametergage limiting the inward travel of the tool to the selected depth of reduction.

This attachment is of great value in all classes of work in which the work is subjected to considerable lateral strains between its ends. This is particularly true of long or slender work or such shoulder work as is indicated in Fig. 8. By the use of this attachment an immense saving of time is effected as compared to the use of supports for this work with which we are familiar, such conventional supports limiting seriously the capacity and freedom of.x the machine and its movements and requiring constant resetting and readjustment.

Having described our invention, we claim- 1. In a machine of the class described, a carriage, a follower-rest having a guideway connection with the carriage, means for reciprocating the follower-rest on the carriage, said follower-rest consisting of a stock having a curved way formed in its side, segments supported in said way, the exposed ends of the segments forming jaws adapted to engage the periphery of the work in the rear of the tool,v and means for adjusting and clamping said segments into said way, substantially as described.

2. In a machine of the class described, a carriage attachment consisting of a stock formed with a curved way, segments adjustably clamped in said way, the front ends of said segments being provided with antifriction -bearings constituting jaws adapted to form a lateral bearing engagement with the periphery of the work in the rear of the tool, substantially as described.

In testimony whereof we have hereunto set our hands.

WILLIAM LODGE. NICHOLAS D. CHARD.

Witnesses:

OLIVER B. KAISER, LUIsE BECK, 

